Hello there @withinthevacuum, please accept my apologies for this inconvenience.
Just to be certain, does this extension work on another browser or this only happens on Brave?
Also, try opening your main profile in private mode to see if the extension load. If it does, try disabling your extensions to see if this is the cause of the issue.
On your computer, open Brave.
At the top right, click Menu → More tools → Extensions.
On to the extension you want to remove, click Remove.